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Groups > linux.kernel > #1210783 > unrolled thread
| Started by | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| First post | 2015-08-21 01:20 +0200 |
| Last post | 2015-08-22 03:50 +0200 |
| Articles | 2 — 2 participants |
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Re: [V3 PATCH 2/4] panic/x86: Allow cpus to save registers even if they are looping in NMI context Peter Zijlstra <peterz@infradead.org> - 2015-08-21 01:20 +0200
RE: [V3 PATCH 2/4] panic/x86: Allow cpus to save registers even if they are looping in NMI context 河合英宏 / KAWAI，HIDEHIRO <hidehiro.kawai.ez@hitachi.com> - 2015-08-22 03:50 +0200
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Date | 2015-08-21 01:20 +0200 |
| Subject | Re: [V3 PATCH 2/4] panic/x86: Allow cpus to save registers even if they are looping in NMI context |
| Message-ID | <pZHhM-2HW-15@gated-at.bofh.it> |
On Thu, Aug 06, 2015 at 02:45:43PM +0900, Hidehiro Kawai wrote: > When cpu-A panics on NMI just after cpu-B has panicked, cpu-A loops > infinitely in NMI context. Especially for x86, cpu-B issues NMI IPI > to other cpus to save their register states and do some cleanups if > kdump is enabled, but cpu-A can't handle the NMI and fails to save > register states. > > To solve thie issue, we wait for the timing of the NMI IPI, then > call the NMI handler which saves register states. Sorry, I don't follow, what? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | 河合英宏 / KAWAI，HIDEHIRO <hidehiro.kawai.ez@hitachi.com> |
|---|---|
| Date | 2015-08-22 03:50 +0200 |
| Message-ID | <q066u-4vg-11@gated-at.bofh.it> |
| In reply to | #1210783 |
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